SILENCERCO ASR 9MM FLASH HIDER M13.5X1LH

Description

The SilencerCo ASR Flash Hider is a muzzle device designed to serve double duty: it reduces visible muzzle flash at the report, and it acts as the mounting interface for SilencerCo suppressors that use the ASR (Active Spring Retention) mount system. For shooters who run a host pistol or carbine in 9mm and want a clean, repeatable way to attach and detach a suppressor, this is the piece that makes that system work.

The left-hand thread pattern — 13.5×1 LH — is the standard pitch for 9mm threaded barrels that are intended to mate with the ASR mount. Left-hand threads are used here because the rotational forces generated during firing would tend to unscrew a conventional right-hand device; reversing the thread direction means those same forces help keep it seated. That detail matters in practice: a muzzle device that loosens under fire changes point of impact and creates a safety concern, neither of which you want mid-string.

When used without a suppressor, the flash hider functions on its own to break up and redirect propellant gases at the muzzle, reducing the bright signature that can wash out your vision in low-light conditions. When a compatible ASR-mount suppressor is installed, the spring-retention mechanism locks the can securely without tools and allows fast removal the same way. The design is built around consistent indexing, so the suppressor returns to the same rotational position each time — relevant for cans where baffle alignment relative to bore centerline matters.

Part number AC1561 fits the SilencerCo ASR suppressor family and is a straightforward upgrade for any 9mm host already threaded to the matching specification.